help request: Can i use etcd's gRPC proxy as apisix's etcd?

[Nobilta]

Description

i know that apisix's watch is based on http/1.1,so if i have many route or upstream,apisix will make lots of post request to etcd(such as this paper:https://apisix.apache.org/zh/blog/2021/08/10/apisix-nginx/#%E5%9F%BA%E4%BA%8E-etcd-watch-%E6%9C%BA%E5%88%B6%E7%9A%84%E9%85%8D%E7%BD%AE%E5%90%8C%E6%AD%A5%E6%96%B9%E6%A1%88)
so can i use etcd's gRPC proxy(https://etcd.io/docs/v3.5/op-guide/grpc_proxy/) to coalesce watch and improve my performance?if it can be use,why i have some errors in logs,and how can i to fix it ?(i make sure etcd is work,i can use client to control etcd cluster)

lua ./apisix/cli/apisix.lua start

Sep 01 19:38:10 apisix[15069]: lua: /usr/local/apisix/apisix/cli/etcd.lua:215: attempt to index local 'body' (a number value)

Sep 01 19:38:10 apisix[15069]: stack traceback:

Sep 01 19:38:10 apisix[15069]: /usr/local/apisix/apisix/cli/etcd.lua:215: in function 'init'

Sep 01 19:38:10 apisix[15069]: /usr/local/apisix/apisix/cli/ops.lua:689: in function 'init_etcd'

Sep 01 19:38:10 apisix[15069]: /usr/local/apisix/apisix/cli/ops.lua:752: in function '?'

Sep 01 19:38:10 apisix[15069]: /usr/local/apisix/apisix/cli/ops.lua:840: in function 'execute'

Sep 01 19:38:10 apisix[15069]: ./apisix/cli/apisix.lua:34: in main chunk

Sep 01 19:38:10 apisix[15069]: [C]: ?

Sep 01 19:38:10 systemd[1]: apisix.service: control process exited, code=exited status=1

Sep 01 19:38:10 systemd[1]: Failed to start apisix.

Environment

• APISIX version (run apisix version):v2.15
• Operating system (run uname -a):centos
• OpenResty / Nginx version (run openresty -V or nginx -V):
• etcd version, if relevant (run curl http://127.0.0.1:9090/v1/server_info):v3.5
• APISIX Dashboard version, if relevant:
• Plugin runner version, for issues related to plugin runners:
• LuaRocks version, for installation issues (run luarocks --version):

[tokers]

No, you cannot (at least for now). The ETCD proxy is just a transparent proxy and you still have to use the gRPC protocol from APISIX, which has not been supported yet.

[Nobilta]

No, you cannot (at least for now). The ETCD proxy is just a transparent proxy and you still have to use the gRPC protocol from APISIX, which has not been supported yet.

@tokers fine,but if i want to decrease watch numbers(because my etcd cluster is high load),what should i do?modify the config_etcd.lua's syncdata function?

[tokers]

No, you cannot (at least for now). The ETCD proxy is just a transparent proxy and you still have to use the gRPC protocol from APISIX, which has not been supported yet.

@tokers fine,but if i want to decrease watch numbers(because my etcd cluster is high load),what should i do?modify the config_etcd.lua's syncdata function?

That would be error prone. We are releasing the apisix 3.0 which will use gRPC to communicate with etcd.

[Nobilta]

No, you cannot (at least for now). The ETCD proxy is just a transparent proxy and you still have to use the gRPC protocol from APISIX, which has not been supported yet.

@tokers fine,but if i want to decrease watch numbers(because my etcd cluster is high load),what should i do?modify the config_etcd.lua's syncdata function?

That would be error prone. We are releasing the apisix 3.0 which will use gRPC to communicate with etcd.

that's exciting,when we can use it?

[guitu168]

A preview version of 3.0 will be released at the end of September.

[qiqizjl]

3.0 has been Released. But it seems that the grpc part is not included?

[tzssangglass]

ref: #8229 (comment)

[shreemaan-abhishek]

The gRPC support has now been removed: #10015